A complementary architecture for high-speed true random number generator

In this paper, we introduce a novel FPGA-based design for true random number generator (TRNG). It is able to harvest the timing difference caused by the nonuniformity of the Integrated Circuits (ICs) and use it to generate the randomness. Compared with the previous related work, this design uses a complementary scheme that leads to a doubled data rated output. The proposed complementary design has improved entropy and achieved higher throughput. The prototype design has been implemented and verified on a Xilinx Virtex-6 ML605 evaluation board. As a result, the generated random number stream is able to pass the statistical NIST and DIEHARD test suites showing a reliable performance. Meanwhile, it can approach the maximum data rate as 50 Mbps stably.